Flood Modeling on Koya Catchment Area Using Hyfran, Web Map Service, and HEC-RAS Software

Anwer H. Dawood; Dana K.  Mawlood; Nadhir  Al-Ansari

doi:10.14500/aro.10824

Anwer H. Dawood (1) Department of Civil Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region – F.R. Iraq; (2) Department of Geotechnical Engineering, Faculty of Engineering, Koya KOY45, Kurdistan Region – F.R. Iraq http://orcid.org/0000-0002-3551-455X
Dana K. Mawlood Department of Civil Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region – F.R. Iraq https://orcid.org/0000-0003-4291-6917
Nadhir Al-Ansari Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, Lulea, Sweden https://orcid.org/0000-0002-6790-2653

Keywords: Catchment area management, Flood delineation, Flood modeling, Hydrologic process, Hyfran and Web Map Service software

Abstract

In this research, The boundaries of the Koya catchment area have been delineated, and valley paths in the region were drawn by using the Water Modeling System (WMS) software, Analysis of the morphometric information indicated that the morphometric characteristics of watersheds contribute to the floods. The average surface runoff depth depends on the curve number values that are determined based on the types of soil cover and soil class according to Harmonized World Soil Database HWSD software that indicates the soil class in the study area are Group B silt loam, The results obtained also show that the potential for surface runoff varies with land use and soil characteristics. Also, the value of the curve number (CN) was determined to be 71. The hydrological modeling was performed by the HEC-HMS program that simulates the process of rainfall to runoff using the SCS curve number model. A flood hydrograph was constructed at the catchment area outlet and the floodplain delineation was verified by the HEC-RAS software. The results indicated that the 100-year return period flood could Reach critical areas such as the urban area, agricultural area, residential areas. the results of this study indicate that there are suitable sites in the catchment areas for constructing small dams and ponds for water harvesting.

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Author Biographies

Anwer H. Dawood, (1) Department of Civil Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region – F.R. Iraq; (2) Department of Geotechnical Engineering, Faculty of Engineering, Koya KOY45, Kurdistan Region – F.R. Iraq

Anwer H. Dawood is a Lecturer at the Department of Geotechnical Engineering, Faculty of Engineering, Koya University. He got the B.Sc. degree in in Dams & water resources Engineering from the University of Mosul in 2000, M.Sc. Degree also in Dams & Water Resources Engineering from the University of Mosul 2004, and now he is PhD candidate at the Department of Civil Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region – F.R. Iraq. His research interests are focuses on Hydrological Modeling , Water Resources Management, Hydraulic Engineering.

Dana K. Mawlood, Department of Civil Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region – F.R. Iraq

Dana K. Mawlood is a Professor at the Department of civil Engineering, College of Engineering, Salahaddin University-Erbil. He got the B.Sc. degree in civil Engineering: Water and Environmental Engineering, Vienna University of Technology, Austria, M.Sc. degree in civil Engineering, Water and Environmental Engineering, Vienna University of Technology, Austria, and Ph.D. degree in Technic Science Civil Engineering, Vienna University of Technology, Austria, in 2003. His research interests are in Isotope Hydrology, Ground water pumping test, and Environmental Engineering.

Nadhir Al-Ansari, Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, Lulea, Sweden

Nadhir Al-ansari is a Professor at the Department of Civil, Environmental and Natural Resources Engineering, Lulea Technical University Sweden. He got the BSc and MSC degrees from the University of Baghdad in 1968 and 1972 respectively. and the Ph.D. degree from Dundee University in Water Resources Engineering in 1976, His Publications include more than 700 articles in journals and 21 books. He executed more than 60 major research projects in Iraq, Jordan and UK. Got several scientific Awards. His research interests are Environmental
Engineering, civil Engineering, Hydrology.

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